I am struggling to change the text color of an Annotation class via arcpy.
For example, I have this in my ArcGIS Pro project:

A simple point which is annotated with the text "272.22".
The properties of this instance "272.22" of the Annotation class look as follows (some attribute values are German; "Platziert" means "placed", "Nein" means "no", "Unten" means "Bottom", "Links" means "left", so nothing wild):

If I look at the properties of the layer of the Annotation class in the content tree, the following properties are displayed (again some German attributes and attribute values, but I think the concrete values are not relevant for the problem and pretty self-explanatory as well):

How can I change the color of all the texts of this Annotation class via arcpy?
In my arcpy script, I already have a reference to the corresponding layer object (acquired via the listLayers() method of the active map). The Annotation's layer does not have a symbology, so I can't change the color via symbology.renderer.symbol.color. Is there a way for Annotations? I am executing my script in the ArcGIS Pro python window.